/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/DenseMatrix.h
Return C = A x B, where A is an Nx6 matrix, and B is a 6x6 mass matrix (Mass in upper left 3x3 diagonals, Inertia in lower right 3x3). C = |A0 A1| * |M 0| = |A0.M A1.I| |0 I|
template<int32 T_EA> static [TDenseMatrix](API\Runtime\Chaos\Chaos\TDenseMatrix)< MaxElements > MultiplyAB ( const [TDenseMatrix](API\Runtime\Chaos\Chaos\TDenseMatrix)< T_EA > & A, const [FMassMatrix](API\Runtime\Chaos\Chaos\FMassMatrix) & B )